Numerical Integration of Shell Equations Using the Field Method

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Abstract
The “field method” for the numerical solution of even-order linear boundary-value problems in ordinary differential equations is formulated. This method converts the boundary-value problem into two successive initial-value problems, which may be solved by standard forward integration techniques. The method has been implemented in a computer program to calculate the static response of ring-stiffened branched shells of revolution to asymmetric loads. For such problems the field method eliminates the well-known numerical problem of “long subintervals”, as well as executing significantly faster than other numerical integration methods.

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